Inboard-motor-boat attachment



Feb. 4; 1930. 1-. F. COLLINS I I I NBOARD MOTOR BOAT ATTACHIENT Filed my 2a. 1928 2 Sheets-Sheet 1 Feb. 4, 1930. r T. F. COLLINS I "1,745354 INBOARD MOTOR BOAT ATTACHIENT 7 fivuen/ori' Tmwhy F comm/a.

Patented Feb; 4, 193% srATEs PATENT OFFICE TIMOTHY F. COLLINS, OF SOIVLERV'ILLE, MASSACHUSETTS INBOARD-MO'IOR-BOAT ATTACHMENT Application filed May 28,

' 5' propeller may be raised out of the water or lowered into the water and locked in position when it is raised, whereby when the boat is brought to shore it can be rowedor otherwise propelled on to the beach without the use of a tender. In motor boats as at present constructed, the propeller being permanently positioned below the keel of the boat, this is I impossible and a tender has to be utilized in order to reach the beach. To these ends the invention consists in an attachment for a motor boat as hereinafter set forth in the specification and particularly pointed out in the claims.

Referring to the drawings:

Figure 1 is a side elevation of a portion of the stern of a motor boat, with my improved attachment embodied therein.

Fig. 2 is a rear elevation of a portion of the stern of a motor boatwith my improved at- 25 tachment embodied therein. 7 o I I Fig. 3 is a sectional plan taken on line 33,

' Fig. 2. o Like numerals refer to like parts in the several views of the drawings. v

In the drawings, 5'is a portion of a boat. 6 is the transom at the stern of the boat, 7 the j keel, and 8 the bottom boarding. 9 is a chamber comprising a pair of oppositely disposed side walls 10 and 11 and an end wall 12 which 135 connects the front ends of the side walls together. The rear ends of the side walls are fastened to the transom and the bottoms of the side walls are fastened to the keel 7 and bracket strips 13, see Figs. 1 and 2.

The bottom of theboat has a slot 14 therein extending from the stern toward the front, and the stern-of the boathas a vertical slot 15 therein. Ways 16 and 17 are fastened to the rear outer face of the stern of the boat and in these ways a slide 18 is slidably mounted. The slide or strut-18 projects downwardly below the bottom of the boat when the propeller is in operative position, as illustrated in Figs. 1 and 2,and a journal 19 is pivotjally mounted by means of screws 20 to the 1928. Serial No. 281,042.

lower end of the strut. A propeller shaft 21 isrotatably mounted in the journal 19 and has'a propeller 22 fast to its rear end, the front end of the propeller shaft 21 being connected by a universal joint 22 to a motor shaft 23 and the propeller shaft 21 projects through the chamber 15 between the side walls 16 and 17.

Stops 24 are fastened to the transom at the bottom of the keel tolimit the distance to which the slide 18 can move downwardly, and

a hook 25 is provided which engages an eye,

in the stern ofthe boat, not shown in the drawings, when the slide 18 is raised and the propeller 22 is out of the water. I

The chamber walls 10 and 11 and the end wall 12 are of sufficient height to prevent the water from entering the boat. The operation of the device is as follows When the propeller 22 is operating it is in the position illustrated in Fig. 1 and the shaft then rotates in the journal 19 and is inclined upwardly extending through the chamber 9 and fastened at its upper end to the universalijoint 22', rotation being imparted to the propeller shaft 21 by the motorshaft23 through said universal j oint;

When it is desired to beach the boat, or for any reason to remove the propeller from the water and raise it above the bottom of the 1 boat, the slide 18 is moved upwardly until the shaft 21 assumes the position illustrated in dotted lines and the propeller will at that time be out of the water. Before the slide is moved upwardly, as described, to move the propeller out of operative position, the motor shaft may be thrown into neutral by means of a clutch, not shown in the drawings, but in a manner well known to those skilled in the art.

I claim:

1. A motor boat having a chamber in its stern comprising a pair of oppositely disposed side walls and an end wall connecting the front ends of said side walls, the stern of the boat having a vertical slot therein and the side walls fast to the stern on opposite sides of the slot, the bottom of the boat having a slot extending longitudinally thereof from the stern toward the said end wall, a motor 1 shaft, a propeller shaft pivotally connected to the motor shaft andnormally extending downwardly therefrom at an angle through said chamber out of the bottom of the boat, a propeller fast to said propeller shaft, a journal adjacent the propeller in which said propeller shaft is rotatably mounted, ways on the rear outer face of the stern of said boat, and a vertically disposed slide on the rear outer face of the stern of said boat slidable in said ways and on which said journal is pivotally mounted, whereby said propeller shaft may be raised or lowered to lift said propeller out of operation or vice versa, V

2. A motor boat having a chamber in its stern comprising a pair of oppositely disposed side walls and an end wall connecting the front ends of said side walls, the stern of the boat havinga vertical slot therein and the side walls fast to the stern on opposite sides of the slot, the bottom of the boat having a slot extending longitudinally thereof from the stern toward the said end wall, a motor shaft, a propeller shaft pivotally connected to the motor shaft and normally extending downwardly therefrom at an angle through said chamber out of the bottom of the boat, a propeller fast to said propeller shaft, a journal adjacent the propeller in which said propeller shaft is rotatably mounted ways on the outer face of the stern of said boat, a ver tically disposed slide on the rear outer face of the stern of said boat slidable in said ways 7 and on which said journal is pivotally mounted, whereby said propeller shaft may be raised or lowered to liftsaid propeller out of operation or vice versa,'and means to lock said slide, with the propeller, out of operation.

In testimony whereof I have hereunto set :my hand. i

TIMOTHY F. COLLINS. 

